Double-sash casement windows



All@ 14, 1952 A. W. NICHOLSON 3,048,901

DoUBLE-sAsH CASEMENT WINDOWS Filed May 4, 1956 3,048,901 DOUBLE-SASH CASEMENT WENDQWS Agnew W. Nicholson, 133 Lawton Blvd., Toronto, Ontario, Canada Filed May 4, 1956, Ser. No. 582,751 3 Claims. (Cl. Ztl-55) This invention relates to a double-sash Casement window, and to a device coupling the same so that they may be opened and closed together by opening and closing the inner sash.

Known double-sash Casement windows, particularly aluminum windows, both sashes of which open outwardly, are not satisfactory, in that they either jam and therefore do not operate satisfactorily, or the outer sash rattles when in closed position. This is also true of double-sash Casement windows the sashes of which open inwardly, the outer sash rattling when in closed position.

`On the other hand, a double-sash easement window wherein the two sashes are coupled in accordance with my invention, is easily and satisfactorily operated by opening or closing the inside sash, and the outside sash does not rattle when in closed position.

The object of the invention, therefore, is to provide a double-sash Casement window that is satisfactorily operated by the inside sash, and the outer sash of which does not rattle when the window is in closed position. This is rendered possible by the use of elongate means coupling the inside and the outside sashes together, which means are laterally flexible, and longitudinally resilient to resiliently resist both longitudinal and lateral deformation from a normal, stress-free or relaxed position.

In the drawing, wherein is shown one form-the preferred formof the coupling device,

FIGURE 1 is a horizontal section showing a double sash, outwardly-opening Casement window, the two sashes of which are coupled together in accordance with this invention;

FIGURE 2 is a fragmentary view of FIGURE 1, on an enlarged scale;

FIGURE 3 is a perspective view of the coupling device shown in FIGURE l;

FIGURE 4 is a bottom plan view of the spring and washer assembly shown in FIGURE 3.

Referring now by numerals to the drawing, 1) shows a window, of which 11 and 12 are the inside and outside sashes, respectively. Both sashes are hinged to one side vertical rail 13 of the window frame.

The coupling device is shown as D; it is operatively attached at opposite ends to the sashes, more particularly to the side (vertical rail) of each of the sashes which is remote from the hinges. By opening or closing the inside sash 11, both sashses are operated together as a unit.

The form of the device shown comprises a member or bracket 15 including a substantially fiat member 22 which is attached to one of the sashes, say, the outer sash; a coil spring 16; a washer 17; and a screw 18 to be threaded to the inner sash, as best seen in FIGURE 2.

One end of the bracket is formed with a circular aperture 19 of a diameter approximately equal to the inside diameter of the spring, so that one end of the spring may be attached to the bracket by threading the spring 16 onto the member 22, axially of the aperture 19, as best seen in FIGURE 3.

The effective length of the spring may be thus varied to a limited extent, if need be, by turning the spring on its longitudinal axis, once the spring is attached to the bracket.

If desired, a length or core of rubber or some flexible plastic may be inserted within the spring.

The washei 17, which preferably is formed with a cut- 3,048,961 Patented Aug. 14, 1962 out to provide a straight edge 21, is threaded onto the spring, as best seen in FIGURES 3 and 4, and serves as a support for the head of the screw, so that the spring may be attached to the inside sash by the screw.

The spring is so chosen that when relieved of tension (or otherwise being unstretched) its successive coils are in contact with one another.

Thus, the two sashes are in effect connected together by a member or coupling which is laterally flexible and is stretchable under tension, but when in normal, unstretched condition, can act as a compression (in eect solid), though laterally flexible, member or push rod. When stretched, the spring has resiliency stored therein, tending to pull the outside sash inwardly toward the inside sash.

The length of the spring is also so chosen that when the two sashes of the window are in closed position, and the inside window or sash is locked in closed position, the spring is under tension (stress) sufcient to hold the outside sash firmly in closed position, thereby preventing rattling of the outside sash.

In practice, both the spring and washer are attached to the bracket. The bracket is attached to the outside sash of the window, when in place, and the free end of the spring is attached to the inside sash by the screw 18.

To open the window, the inside sash is unlocked and pushed or swung outwardly as usual, the spring, now unstretched, acting as a more or less solid, though laterally flexible, push rod.

As already stated, the invention is shown herein as applied to a double-sash, outwardly-opening Casement window. To retain the outer sash firmly in its closed position, thereby preventing rattling, the coupling resilient member proper-the spring 16-is so chosen that it is longitudinally elongated (in tension) when both sashes are in window-closing position.

If the invention is to be applied to a double-sash, inwardly-opening Casement window, the spring or resilient coupling member must be so chosen that it is longitudinally shortened (in compression) when both sashes are in window-closing position.

It is to be understood that the applicant is not to be limited to the form of coupling means shown, as obviously other mechanical equivalents may be quite possible of application, provided the coupling device is laterally flexible and is effectively stretched or in tension when connected between the sashes of an outwardly-opening Casement window, or is in compression when connected between the two sashes of an inwardly-opening Casement window. For instance, the spring could be substituted `by a rubber, resilient member or tube, or by a resilient member made of some suitable plastic.

What I claim is:

1. For use in combination with a rectangular window frame, a first window sash, means on said frame engageable with said first window sash to define a closed position of said first window sash within said frame, means supporting said first window sash on said frame for pivotal movement toward and away from said closed position about a lirst axis extending along one side of said frame, land means for latching said first window sash to said frame in said closed position; a second window sash mounted upon said frame for pivotal movement about a second axis spaced from and parallel to said first axis, second means on said frame engageable with said second window sash to define a closed position wherein said second window sash is in spaced parallel relationship with said first window sash when said first window sash is in its closed position, and means coupling said window sashes to each other comprising an elongate coupling member, said member being longitudinally and laterally ECC resilient to resiliently resist both longitudinal and lateral deformation from a relaxed condition, first means securing one end of said coupling member to said first sash on the side of said sash remote from said first axis and holding said one end of said coupling member in fixed relationship to said iirst sash to resiliently resist both longitudinal and lateral movement of the other end of said coupling member relative to said irst sash, second means securing said other end of said coupling member to said second sash on the side of said second sash adjacent said remote side of said first sash and holding said other end of said coupling member in fixed relationship to said second sash to resiliently resist both longitudinal and lateral movement of said one end of said coupling member relative to said second sash, the relaxed length of said member diiering from the spacing between said window sashes When in their respective closed positions to resiliently force said second Window sash to its closed position when said irst window sash is latched in its closed position.

2. For use in combination with a double sash Casement window assembly including a rectangular window frame, an inner window sash mounted for pivotal movement about a rst axis extending along the inner edge of one side of said frame, an outer window sash mounted for pivotal movement about a second axis extending along the outer edge of said one side of said frame in spaced parallel relationship to said rst axis, means on said frame defining closed positions of both Window sashes wherein said window sashes are in spaced parallel relationship with each other, said Window sashes being movable in the same direction about their respective axes from their respective closed positions, and means for latching inner Window sash in its closed position; means coupling said window sashes to each other comprising an elongate coupling member, said member being longitudinally and laterally resilient to resiliently resist both longitudinal and lateral deformation from a relaxed condition, rst means securing one end of said coupling member to said inner sash on the side of said inner sash remote from said rst axis and holding said one end of said coupling member in fixed relationship to said inner sash to resiliently resist both longitudinal and lateral movement of the other end of said coupling member relative to said inner sash, second means securing said other end of said coupling member to said outer sash at a location wherein said coupling member is deformed only longitudinally when said window sashes are in said closed position and holding said other end of said coupling member in fixed relationship to said outer sash to resiliently resist both longitudinal and lateral movement of said one end of said coupling member relative to said outer sash, the longitudinal deformation of said member being such as to resiliently bias said outer window sash to its closed position when said inner window sash is latched in its closed position.

3. A coupling assembly as dened in claim 2 wherein at least one of said iirst and said second securing means includes means for adjusting the length of said coupling member between said irst and said second securing means.

References Cited in the file of this patent UNITED STATES PATENTS 1,465,679 Palm Aug. 21, 1923 1,589,697 Howd .Tune 2.2, 1926 2,145,419 Hopkins Ian. 31, 1939 2,231,573 Etling Feb. l1, 1941 

